Worked as an apartment building manager prior to his success on "Home Improvement" , and even maintained that job during the show's first season until he knew that Home Improvement would be successful.

Karn got his role for Home Improvement when he ran a stop sign and had to retake his license test. While he was at the driving agency, somebody told him about them looking for someone to play Al Boreland in a new show called Home Improvement; Karn took straight to the role.

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